1. Someone who pisses you off so much that you wish you could use them to floss the dried feces off a greasy perverts crack.
2. A stupid or foolish person, usually with many enemies who can't stand his/her daily actions.
3. an antonym for asswhipe or jackass.
4. a thong.

That assfloss consitantly performs the same skateboarding trick even though he gets hurt each time.